Celebrate with us

CMS turns twenty-five!


Interviews with young CMS members

Get a special view of CMS through the eyes of ~25-year-old members, who were born around the time that the collaboration came into being. Find out why they got into particle physics and what it means to be a part of CMS.

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From the archives of CMS institutes

With nearly 500 signatories to the original Letter of Intent, CMS has always been a gigantic enterprise. Dive in to the archives of the founding institutes of CMS and learn about their contributions over the years.

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A personal perspective of the CMS story

Professor Daniel Denegri, founding member and former Physics Coordinator of the CMS Collaboration, gives us a personal perspective on CERN, the LHC and the story of CMS (so far!).

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“We propose to build a general purpose detector designed to run at the highest luminosity at the LHC. The CMS (Compact Muon Solenoid) detector has been optimized for the search of the [Standard Model] Higgs boson over a mass range from 90 GeV to 1 TeV, but it also allows detection of a wide range of possible signatures from alternative electro-weak symmetry breaking mechanisms.”

From the Abstract of the CMS Letter of Intent, 1 October 1992


In October 1992, a ‘Letter of Intent’ was submitted to the LHC Experiments Committee (LHCC), offically marking the formation of the CMS Collaboration. This website commemorates the 25th anniversary of CMS, celebrated in 2017.